Planning application
26/00377/FULL
20 Blenheim Terrace London NW8 0EB
Proposal
Replacement of a window with a door at rear, raise level of rear flat roof, installation of new railings, all in association with the use of the flat roof as a terrace. Installation of replacement windows to front and rear.
As published by the council, reference 26/00377/FULL
Timeline
Dates from the published record
-
22 Jan 2026
Received by Westminster
-
25 Mar 2026
Validated
Checked as complete and ready for consideration.
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.
What happens while it is decided
The process from here
This application is with Westminster for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
About full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
-
26/01673/FULL Awaiting decision
3 Ryder's Terrace London NW8 0EE
Erection of a 1st floor rear addition, additional rooflight and alterations to existing rooflights.
-
25/05698/TCA Granted
29 Blenheim Terrace London NW8 0EH
1 x Purple plum: fell
-
26/03754/TCA Awaiting decision
41 Abbey Road London NW8 0AA
T1 Lime-Tilia Cordata Reduce by up to 3-4 metres in line with the attached photo annotations.
-
26/01837/FULL Awaiting decision
Basement Flat 1A Abbey Court Abbey Road London NW8 0AU
Conversion of two existing flats (1A and 1 Abbey Court) into three flats (1A, 1 and 2A) with extensions and terraces to rear at lower ground floor level, landscaping, and associated external alterations.
-
25/07072/ADFULL Awaiting decision
23 Abbey Court Abbey Road London NW8 0AU
Detailed drawings of Existing and proposed front window casement details (1:2 and 1:10) pursuant to condition 4 of planning permssion dated 27th March 2025 (RN: 25/00229/FULL).
-
25/05815/FULL Awaiting decision
44 Blenheim Terrace London NW8 0EG
Removal of an existing timber shed, laying of a concrete foundation, and installation of a new timber garden room.
Other full applications applications
In Westminster
-
26/04824/ADFULL Granted
New Zealand House 80 Haymarket London SW1Y 4TE
Detailed design and specification of new blinds to NZH based on mock-up trials on-site. pursuant to condition 32 (i) of planning permission dated 8th April 2024 (23/00571/FULL).
-
26/04829/ADFULL Granted
New Zealand House 80 Haymarket London SW1Y 4TE
Details of external and internal signage strategy pursuant to Condition 33(E) of planning permission dated 8th April 2024 (RN: 23/00571/FULL)
-
26/04841/ADFULL Granted
29 Henstridge Place London NW8 6QD
Details of the facing materials you will use, including glazing, and elevations and roof plans annotated to show where the materials are to be located pursuant to condition 5 of planning permission dated 18th November 2025 (RN:25/06159).
-
26/04989/FULL Awaiting decision
1 Kildare Terrace London W2 5JT
Erection of a mansard roof extending over the main house and side wing, replacement lower ground rear extension with roof terrace above, lowering of lower ground floor slab, installation of an air source heat pump in rear garden, new front boundary treatment, and new second floor window on the north elevation.
-
26/04986/FULL Awaiting decision
Inver Court Inverness Terrace London W2 6JB
Replacement of combustible materials in the render facades; timber decking and plastic soffits/ fascias to terraces with non-combustible materials on the 5th and 6th floors.